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中文摘要：
本文搭建了静态闪蒸实验台,对不同初始参数下NaCl溶液静态闪蒸过程中的泡沫层膨胀规律开展了初步地实验研究和理论分析。实验中,过热度为2.9~30 K,初始液膜厚度为0.1 m、0.2 m,溶液初始质量分数为0.2~0.25。实验结果表明;在较大的过热度或者较小的初始液膜厚底下,泡沫层膨胀开始较早,且膨胀较快;而溶液浓度对泡沫层膨胀规律几乎没有影响。此外,本文根据气泡生长理论和质量能量平衡建立并推导出了泡沫层膨胀规律计算模型,实现了对泡沫层高度随时间变化规律的计算,与实验结果吻合得较好。
英文摘要：
Experimental study on expansion law of foam layer during static flash of aqueous sodium chloride solution waterfilm was carried out in this paper.In experiments,waterfilm superheat varied between 2.9 and 30 K,initial water film height between 0.1 and 0.2 m,initial water film concentration between 0.2 and 0.25.Experimental results showed that larger superheat or smaller initial height of waterfilm led foam layer to expand earlier and faster.While waterfilm concentration concentration had nearly no influence on foam layer expansion.In addition,according to classical theory of the bubble growth,and mass and energy balance during flash,a calculation model for foam layer expansion was deduced,according to which foam layer height evolution versus time could be calculated and the result matched well with experimental data.
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